List of top Physics Questions on spherical lenses asked in VITEEE

A convex lens has a focal length of 10 cm. What is the magnification produced when the object is placed 30 cm from the lens?

What is the focal length of a lens if its power is +2 D?

Two thin lenses are in contact and the focal length of the combination is $80\, cm$. If the focal length of one lens is $20 \,cm$, then the power of the other lens will be